Development of Buffer Solution Students’ Worksheet Based on Problem Based Learning with Ethnochemistry to Improve Students’ Science Literacy Ability

Merdeka curriculum emphasizes the ability of students to understand and apply their concepts solve contextual problems. This research aimed determine validity, practicality, effectivity buffer solution students’ worksheet based on problem learning with etnochemistry science literacy ability. The development model used in this is 4-D. was validated by 3 chemistry lectures 2 teachers. Practicality tests were carried out teachers 32 students. Then, level effectiveness students' known through N-gain test. validity test analyzed using aiken's v derived formula consisting content construct which 0.91 0.90 category valid. results practicality 88.80 87.75 higher category. Analysis n-gain value obtained g = 0.86 high Then date quantitative method hypotheses testing, determined that hypothesis accepted. result confirmed ethnochemistry valid, practical, effective improving significantly.